La Crosse Technology black Wireless Temperature Station Wireless outdoor temperature (deg F) Monitors indoor temperature (deg F) Records Min/Max temperature Wireless temperature station for indoor and outdoor readings; detachable base for free-standing or wall-hanging display Split-screen LCD with large top display; 2-button interface for toggling view between MIN/MAX and current indoor and outdoor temperatures Outdoor sensor with 260-foot wireless range; measures outdoor temperatures from -19.9 to 139.8 degrees F Requires separate purchase of 2 AA and 2 AAA batteries; low battery icon for both LCD and remote transmitter Receiver measures 3-1/4 inches wide by 2 inches deep by 4-1/2 inches high; limited 1-year manufacturer warranty Please refer user manual attached below for instructions and troubleshooting steps